Preparation and structural studies of organotin(IV) complexes formed with organic carboxylic acids |
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| Authors: | Byung-Seon Choi Geun-Il Park Jung-Won Lee Ho-Yeon Yang Seung-Kon Ryu |
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| Institution: | (1) Biocoordination Chemistry Research Group of the Hungarian Academy of Sciences, Department of Inorganic and Analytical Chemistry, Szeged University, H-6701 Szeged, P.O. Box 440, Hungary;(2) Department of Inorganic and Analytical Chemistry, Szeged University, H-6701 Szeged, P.O. Box 440, Hungary;(3) Department of Inorganic Chemistry, University of Palermo Parco d'Orleans, Viale della Scienze, Palermo, Italy;(4) Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma, Jonan-ku, Fukuoka, 814-01, Japan |
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| Abstract: | The complexes of six organic carboxylic acids (containing {O,O} donor atoms) with Bu2Sn(IV)2+ and Ph3Sn(IV)+ with ligand to metal ratios of 1 : 1 and 1 : 2, were prepared by two different methods. The FtIR and Raman spectra clearly demonstrated that the organotin(IV) moieties react with the {O,O} atoms of the ligands. It was found that in most cases the -COO-group was chelated to the central metal ions, but monodentate coordination was also sometimes observed. Complex formation was accompanied by a rearrangement of the hydrogen-bonding network existing in the ligands. The complexes probably have polymeric structures. Comparison of the experimental Mössbauer D values with those calculated on the basis of the point charge model formalism revealed that the organotin(IV) moiety has a trigonal-bipyramidal (tbp) geometry, and in certain cases a tetrahedral (tetr) geometry too. Finally, the local structure of the maleic acid complex formed with Bu2Sn(IV)2+ was determined by an EXAFS method. |
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